Inspite of interspecific competition in nature, which mechanism the competing species might have evolved for their survival?

1. Mutualism

2. Predation

3. Resource partitioning

4. Competitive release

Amensalism can be represented as:

(1) Species A (-) : Species B (-)

(2) Species A (+) : Species B (0)

(3) Species A (-) : Species B (0)

(4) Species A (+) : Species B (+)

In the exponential growth equation N_t =N₀e^rt, e represents :

1. The base of natural logarithms 

2. The base of geometric logarithms

3. The base of number logarithms

4. The base of exponential logarithms

Match List-I with List-II

Choose the correct answer from the options given below :

Secondary metabolites such as nicotine, strychnine and caffeine are produced by plants for their:

1. Growth response

2. Defence action

3. Effect on reproduction

4. Nutritive value

Which of the following is not an attribute of a population?

1.  Natality

2.  Mortality

3.  Species interaction

4.  Sex ratio

The process of growth is maximum during:

1. Lag phase

2. Senescence

3. Dormancy

4. Log phase

Match the items in Column-I with those in Column-II:

Select the correct option from the following:

1. (a)-(iv), (b)-(ii), (c)-(i), (d)-(iii)

2. (a)-(iii), (b)-(ii), (c)-(iv), (d)-(i)

3. (a)-(ii), (b)-(i), (c)-(iii), (d)-(iv)

4. (a)-(i), (b)-(iii), (c)-(iv), (d)-(ii)

The impact of immigration on population density is:-

1. Negative

2. Both positive and negative

3. Neutralized by natality

4. Positive